/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.ibatis2.dao.elements;

import static org.mybatis.generator.internal.util.JavaBeansUtil.getSetterMethodName;

import java.util.Set;
import java.util.TreeSet;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.Interface;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class DeleteByPrimaryKeyMethodGenerator extends AbstractDAOElementGenerator {

  public DeleteByPrimaryKeyMethodGenerator() {
    super();
  }

  @Override
  public void addImplementationElements(TopLevelClass topLevelClass) {
    Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
    Method method = getMethodShell(importedTypes);

    StringBuilder sb = new StringBuilder();

    if (!introspectedTable.getRules().generatePrimaryKeyClass()) {
      // no primary key class, but primary key is enabled. Primary
      // key columns must be in the base class.
      FullyQualifiedJavaType keyType = new FullyQualifiedJavaType(introspectedTable.getBaseRecordType());
      topLevelClass.addImportedType(keyType);

      sb.setLength(0);
      sb.append(keyType.getShortName());
      sb.append(" _key = new "); //$NON-NLS-1$
      sb.append(keyType.getShortName());
      sb.append("();"); //$NON-NLS-1$
      method.addBodyLine(sb.toString());

      for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns()) {
        sb.setLength(0);
        sb.append("_key."); //$NON-NLS-1$
        sb.append(getSetterMethodName(introspectedColumn.getJavaProperty()));
        sb.append('(');
        sb.append(introspectedColumn.getJavaProperty());
        sb.append(");"); //$NON-NLS-1$
        method.addBodyLine(sb.toString());
      }
    }

    sb.setLength(0);
    sb.append("int rows = "); //$NON-NLS-1$
    sb.append(daoTemplate.getDeleteMethod(introspectedTable.getIbatis2SqlMapNamespace(),
        introspectedTable.getDeleteByPrimaryKeyStatementId(), "_key")); //$NON-NLS-1$
    method.addBodyLine(sb.toString());
    method.addBodyLine("return rows;"); //$NON-NLS-1$

    if (context.getPlugins().clientDeleteByPrimaryKeyMethodGenerated(method, topLevelClass, introspectedTable)) {
      topLevelClass.addImportedTypes(importedTypes);
      topLevelClass.addMethod(method);
    }
  }

  @Override
  public void addInterfaceElements(Interface interfaze) {
    Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
    Method method = getMethodShell(importedTypes);

    if (context.getPlugins().clientDeleteByPrimaryKeyMethodGenerated(method, interfaze, introspectedTable)) {
      interfaze.addImportedTypes(importedTypes);
      interfaze.addMethod(method);
    }
  }

  private Method getMethodShell(Set<FullyQualifiedJavaType> importedTypes) {
    Method method = new Method();
    method.setVisibility(JavaVisibility.PUBLIC);
    method.setReturnType(FullyQualifiedJavaType.getIntInstance());
    method.setName(getDAOMethodNameCalculator().getDeleteByPrimaryKeyMethodName(introspectedTable));

    if (introspectedTable.getRules().generatePrimaryKeyClass()) {
      FullyQualifiedJavaType type = new FullyQualifiedJavaType(introspectedTable.getPrimaryKeyType());
      importedTypes.add(type);
      method.addParameter(new Parameter(type, "_key")); //$NON-NLS-1$
    } else {
      for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns()) {
        FullyQualifiedJavaType type = introspectedColumn.getFullyQualifiedJavaType();
        importedTypes.add(type);
        method.addParameter(new Parameter(type, introspectedColumn.getJavaProperty()));
      }
    }

    for (FullyQualifiedJavaType fqjt : daoTemplate.getCheckedExceptions()) {
      method.addException(fqjt);
      importedTypes.add(fqjt);
    }

    context.getCommentGenerator().addGeneralMethodComment(method, introspectedTable);

    return method;
  }
}
